1. Kerogen separation from combustible oil shale by centrifuging;Arna;Tr. Tallinsk. Politekhn. Inst.,1964
2. Chemical investigations of Upper Cambrian shales at Hynneberg, Naerke;Assarsson;Geol. Fören. Stockholm Förh.,1961
3. Organic matter in fine-grained rocks, and its relation to the origin of petroleum;Bonnett,1958
4. Some chemical reactions of Colorado oil shale kerogen;Brower;Ind. Eng. Chem.,1958
5. Reductions by lithium aluminium hydride;Brown,1951